"Therefore leaving the principles of the Doctrine of Christ, let us go on unto perfection, not laying again the foundation of repentance from dead works, and of faith toward God; of the doctrine of baptisms, and of laying on of hands; and of resurrection of the dead, and of eternal judgement. And this we will do, if God permit."
 You have heard how much Paul found fault with the Hebrews for wishing to be always learning about the same things. And with good reason: "For when for the time ye ought to be teachers, ye have need again that some one teach you the elements of the first principles of the oracles of God" (c. v. 12)
I am afraid that this might fitly be said to you also, that “when for the time ye ought to be teachers,” ye do not maintain the rank of learners, but ever hearing the same things, and on the same subjects, you are in the same condition as if you heard no one. And if any man should question you, no one will be able to answer, except a very few who may soon be counted.
But this is no trifling loss. For oftentimes when the teacher wishes to go on further, and to touch on higher and more mysterious themes, the want of attention in those who are to be taught prevents.
For just as in the case of a grammar-master, if a boy though hearing continually the first elements does not master them, it will be necessary for him to be continually dinning the same things into the boy, and he will not leave off teaching, until the boy has been able to learn them accurately; for it is great folly to lead him on to other things, without having put the first well into him; so too in the Church, if while we constantly say the same things you learn nothing more, we shall never cease saying the same things.
For if our preaching were a matter of display and ambition, it would have been right to jump from one subject to another and change about continually, taking no thought for you, but only for your applauses. But since we have not devoted our zeal to this, but our labors are all for your profit, we shall not cease discoursing to you on the same subjects, till you succeed in learning them. For I might have said much about Gentile superstition, and about the Manichæans, and about the Marcionists, and by the grace of God have given them heavy blows, but this sort of discourse is out of season. For to those who do not yet know accurately their own affairs, to those who have not yet learned that to be covetous is evil, who would utter such discourses as those, and lead them on to other subjects before the time?
We then shall not cease to say the same things, whether ye be persuaded or not. We fear however, that by continually saying the same things, if ye hearken not, we may make the condemnation heavier for the disobedient. I must not however say this in regard to you all; for I know many who are benefited by their coming here, who might with justice cry out against those others, as insidiously injuring them by their ignorance and inattention. But not even so will they be injured. For hearing the same things continually is useful even to those who know them, since by often hearing what we know we are more deeply affected. We know, for instance, that Humility is an excellent thing, and that Christ often discoursed about it; but when we listen to the words themselves and the reflections made upon them, we are yet more affected, even if we hear them ten thousand times.
[2.] It is then a fitting time for us also to say now to you, “Wherefore leaving the beginning of the doctrine of Christ, let us go unto perfection.” ...
... [3.] But what is, “let us go on unto perfection”? Let us henceforth proceed (he means) even to the very roof, that is, let us have the best life. ... For as in the case of the letters the Alpha involves the whole, and as the foundation, the whole building, so also does full assurance concerning the Faith involve purity of life. And without this it is not possible to be a Christian, as without foundations there can be no building; nor skill in literature without the letters.
Still if one should be always going round about the letters, or if about the foundation, not about the building, he will never gain anything.